ABSTRACT
The paper presents a study on dissimilar laser welding of pure copper and Aluminum 3003 alloy. During this research conduction mode and keyhole mode were investigated. The microstructure of welded seams and the heat-affected zone were analyzed. Results demonstrated no mixing of metals and a significant presence of intercrystallite composites in the conduction mode. The use of a dynamic beam shape, characterized by two points with varying energy densities, resulted in uniform heat distribution at the copper-aluminum interface and high-strength joint. The tensile strength of the welded pipes ranged from 107-112 MPa, representing 75-80% of the base metal’s strength. Additionally, the joints successfully passed a leak test at 43 atmospheres.
